Corros

A programming language forged from scratch — its own lexer, its own compiler, its own virtual machine — and already written in Corros itself.

GitHub repository Install

Why Corros

Corros has a syntax that belongs to no other language — the foundry vocabulary: forge for variables, craft for functions, when/whilst/each for control flow, speak to print, flaw to raise an error. Rust is written in Rust; Corros is written in Rust and already compiles itself — a byte-identical bootstrap chain (bash demo.sh) proves the compiler and VM written in Corros are the real thing.

// This is Corros. Read it out loud.
forge greet = craft(name) {
  return "hello, " + name
}

each i in 1..=5 {
  when i % 2 == 0 { onward }
  speak(greet("corros"), i)
}

Speed

corros --compile types your program, emits C, and builds a native binary with cc -O3 — compiled Corros sits at the C ceiling and beats Rust, Go, and Python on the repo's benchmark suite (bash bench/run.sh).

fib(30)	time
Corros --compile	~0.03s
hand-written C	parity (same compiler)
Rust (-O)	~0.04s
Go	~0.06s

Corros can talk to the OS

The language ships host services: sockets and an HTTP client, file and process access, and a dynamic FFI (load_lib / lib_call) — enough to write a local LLM server (crucible) entirely in Corros.

Install

curl -fsSL https://raw.githubusercontent.com/CocoCopi/corros/main/install.sh | sh

Or build from source: cargo build --release then put corros on your PATH. Requires nothing but a C compiler for --compile.

Corros — the language that corrodes the competition. 🦀